WASHINGTON -- Sen. John McCain, R-Ariz., was the last member of the Senate Intelligence Committee to question former FBI director James B. Comey at Thursday's dramatic hearing. Nearing the end of more than 2 1/2 hours of questioning, McCain focused his line of questioning on two FBI investigations: the 2016 investigation into Hillary Clinton's use of a private email server and the 2017 investigation into Russian interference in the presidential election.

But several of his questions confused viewers, and seemingly Comey himself, and occasionally became incoherent. He referred to "President Comey," and at times looked confused and frustrated with Comey's answers.

"In the case of Hillary Clinton, you made the statement that there wasn't sufficient evidence to bring a suit against her, although it had been very careless in their behavior, but you did reach a conclusion in that case that it was not necessary to further pursue her," McCain's line of questioning began. "Yet at the same time, in the case of Mr. (Trump), you said that there was not enough information to make a conclusion. Tell me the difference between your conclusion as far as former Secretary Clinton is concerned, and Mr. Trump."

Comey answered that the Clinton email investigation was a completed, closed investigation at the time he announced that "no reasonable prosecutor" would bring a case against her last July, while the Russia investigation is still underway and could be for some time.